Llyn Brianne reservoir
 

I know that there are numerous photos of aircraft flying through the Mach Loop and even Elan Valley.

I see no reference though to Llyn Brianne which lies further south, however as a child I remember that being a different story.

Can anyone advise if it is still used for low level training - I appreciate that it will be on a lesser scale nowadays?

There was a photo set on Fightercontrol taken at Llyn Brianne but I can't find anything on their search function.
We certainly used to get plenty over Lampeter while I was at uni in the early 2000's.